The military and the police of course. Bureau budgets must always be maintained and expanded.
"Legitimacy and need are problems for the military and police, particularly if 'peace' breaks out, and if crime declines. More generally, if social order overtakes social disorder in public perceptions, the military and police become less important. This poses an organizational challenge that has been partially solved by the mass media and popular culture myth-generating machine..."
David L. Altheide, Creating Fear: News and the Construction of Crisis, pp. 153-154.